Use a macro for assembly copy loops

Make it easier to write loops for other sections. Since the macro
expands to the same instructions that we previously had, we can show
that a binary is equivalent before and after this change. Let's use the
binaries generated in this test suite.

Before this change, run the bash script below. Re-run this script with
this change, and show that the hashes for the binaries are the same.

    cargo clean
    cargo test inspect_elf -- --include-ignored --exact imxrt1010evk imxrt1170evk_cm7 imxrt1170evk_cm7_nonboot teensy4 teensy4_fake_dcd 2> /dev/null 1>/dev/null

    for test_binary in imxrt1010evk imxrt1170evk-cm7 imxrt1170evk-cm7-nonboot teensy4 __dcd;
    do
        cat target/${test_binary}/thumbv7em-none-eabihf/debug/examples/blink-rtic | sha256sum -;
    done

0 files changed, 0 insertions, 0 deletions